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Cheap flights from London Gatwick Airport to Washington, D.C. from $496

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London Gatwick Airport to Washington, D.C. departing on 3/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Enter your travel dates to find the best prices.
TAP AIR PORTUGAL Logo
10:40 am - 9:00 pmLGW-IAD
15h 20m1 stop
TAP AIR PORTUGAL Logo
11:30 pm - 3:05 pmIAD-LGW
11h 35m1 stop
$572TAP AIR PORTUGAL
Find Deal
Wed, Mar 4 - Wed, Mar 11
Icelandair Logo
1:00 pm - 7:20 pmLGW-IAD
11h 20m1 stop
Icelandair Logo
11:35 pm - 2:40 pmIAD-LGW
10h 05m1 stop
$578Icelandair
Find Deal
Thu, Apr 30 - Wed, May 6
Icelandair Logo
11:55 am - 6:30 pmLGW-IAD
11h 35m1 stop
Icelandair Logo
7:40 pm - 10:55 amIAD-LGW
10h 15m1 stop
$582Icelandair
Find Deal
Wed, Feb 18 - Mon, Feb 23
Icelandair Logo
11:55 am - 7:30 pmLGW-IAD
11h 35m1 stop
Icelandair Logo
8:40 pm - 10:55 amIAD-LGW
10h 15m1 stop
$589Icelandair
Find Deal
Sun, Mar 22 - Wed, Mar 25
Multiple Airlines Logo
7:40 am - 9:00 pmLGW-IAD
18h 20m2 stops
Multiple Airlines Logo
9:35 am - 10:00 amIAD-LGW
19h 25m1 stop
$592Multiple Airlines
Find Deal
Fri, Jan 16 - Fri, Feb 6
Multiple Airlines Logo
2:00 pm - 7:50 amLGW-IAD
22h 50m1 stop
Multiple Airlines Logo
5:45 am - 10:05 amIAD-LGW
23h 20m2 stops
$593Multiple Airlines
Find Deal
Thu, Nov 27 - Sat, Dec 6
Multiple Airlines Logo
2:00 pm - 7:50 amLGW-IAD
22h 50m1 stop
Multiple Airlines Logo
7:18 pm - 10:00 amIAD-LGW
33h 42m2 stops
$595Multiple Airlines
Find Deal
Thu, Nov 27 - Thu, Dec 4
Multiple Airlines Logo
8:50 am - 3:35 pmLGW-IAD
11h 45m1 stop
Multiple Airlines Logo
9:00 pm - 12:15 pmIAD-LGW
10h 15m1 stop
$597Multiple Airlines
Find Deal
Wed, Nov 26 - Mon, Dec 1
Multiple Airlines Logo
2:00 pm - 8:48 amLGW-IAD
23h 48m1 stop
Multiple Airlines Logo
3:33 pm - 10:00 amIAD-LGW
13h 27m1 stop
$601Multiple Airlines
Find Deal
Fri, Jan 9 - Sun, Jan 11
Icelandair Logo
11:55 am - 6:30 pmLGW-IAD
11h 35m1 stop
Icelandair Logo
8:30 pm - 11:45 amIAD-LGW
10h 15m1 stop
$602Icelandair
Find Deal
Sat, Jan 17 - Sat, May 16

TAP AIR PORTUGAL flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Our best TAP AIR PORTUGAL deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
TAP AIR PORTUGAL
Mar 4
LGW10:40 amLondon Gatwick
15h 20m
1 stop
IAD9:00 pmWashington, D.C. Dulles Intl
Mar 11
IAD11:30 pmWashington, D.C. Dulles Intl
11h 35m
1 stop
LGW3:05 pmLondon Gatwick
$572
Find similar
TAP AIR PORTUGAL
Mar 13
LGW10:45 amLondon Gatwick
15h 15m
2 stops
IAD10:00 pmWashington, D.C. Dulles Intl
Mar 15
IAD11:30 pmWashington, D.C. Dulles Intl
12h 15m
1 stop
LGW3:45 pmLondon Gatwick
$613
Find similar
TAP AIR PORTUGAL
Dec 5
LGW9:25 pmLondon Gatwick
22h 50m
2 stops
IAD3:15 pmWashington, D.C. Dulles Intl
Dec 7
IAD10:30 pmWashington, D.C. Dulles Intl
12h 15m
1 stop
LGW3:45 pmLondon Gatwick
$615
Find similar

Icelandair flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Our best Icelandair deals on London Gatwick Airport to Washington, D.C. Dulles Intl Airport flight tickets
Icelandair
Apr 30
LGW1:00 pmLondon Gatwick
11h 20m
1 stop
IAD7:20 pmWashington, D.C. Dulles Intl
May 6
IAD11:35 pmWashington, D.C. Dulles Intl
10h 05m
1 stop
LGW2:40 pmLondon Gatwick
$578
Find similar
Icelandair
Feb 18
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD6:30 pmWashington, D.C. Dulles Intl
Feb 23
IAD7:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
$582
Find similar
Icelandair
Mar 22
LGW11:55 amLondon Gatwick
11h 35m
1 stop
IAD7:30 pmWashington, D.C. Dulles Intl
Mar 25
IAD8:40 pmWashington, D.C. Dulles Intl
10h 15m
1 stop
LGW10:55 amLondon Gatwick
$589
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated November 13, 2025.
Use the filters below to find and compare flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 3/4

10:40 am-9:00 pm

1 stop15h 20m

Washington, D.C. Dulles Intl

Wed 3/11

11:30 pm-3:05 pm

1 stop11h 35m

$572

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 4/30

1:00 pm-7:20 pm

1 stop11h 20m

Washington, D.C. Dulles Intl

Wed 5/6

11:35 pm-2:40 pm

1 stop10h 05m

$578

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 2/18

11:55 am-6:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Mon 2/23

7:40 pm-10:55 am

1 stop10h 15m

$582

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sun 3/22

11:55 am-7:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Wed 3/25

8:40 pm-10:55 am

1 stop10h 15m

$589

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 1/16

7:40 am-9:00 pm

2 stops18h 20m

Washington, D.C. Dulles Intl

Fri 2/6

9:35 am-10:00 am

1 stop19h 25m

$592

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 11/27

2:00 pm-7:50 am

1 stop22h 50m

Washington, D.C. Dulles Intl

Sat 12/6

5:45 am-10:05 am

2 stops23h 20m

$593

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Thu 11/27

2:00 pm-7:50 am

1 stop22h 50m

Washington, D.C. Dulles Intl

Thu 12/4

7:18 pm-10:00 am

2 stops33h 42m

$595

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Wed 11/26

8:50 am-3:35 pm

1 stop11h 45m

Washington, D.C. Dulles Intl

Mon 12/1

9:00 pm-12:15 pm

1 stop10h 15m

$597

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Fri 1/9

2:00 pm-8:48 am

1 stop23h 48m

Washington, D.C. Dulles Intl

Sun 1/11

3:33 pm-10:00 am

1 stop13h 27m

$601

LondonWashington, D.C.

LGW - IAD

LGWIAD

London Gatwick

Sat 1/17

11:55 am-6:30 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Sat 5/16

8:30 pm-11:45 am

1 stop10h 15m

$602

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

In general, November is the cheapest month to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $522. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of November, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $529.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Thursday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $777. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from London Gatwick Airport to Washington, D.C. Dulles Intl Airport for around $936.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from London Gatwick Airport in the evening is the least expensive time of day to depart. momondo users have found prices as low as $743 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $867 on average. Flights to Washington, D.C. Dulles Intl Airport from London Gatwick Airport in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

When to book flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap London Gatwick Airport to Washington, D.C. Dulles Intl Airport (LGW to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London Gatwick Airport to Washington, D.C. Dulles Intl Airport

Direct flights

None
There are no direct flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from London Gatwick Airport to Washington, D.C. Dulles Intl Airport.
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  • How far is London Gatwick to Washington, D.C. Dulles Intl by plane?

    The distance between London Gatwick and Washington, D.C. Dulles Intl is about 3682.8 mi. A reasonable flight in good conditions will take 11h 20m.

  • When did momondo last update prices for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from London Gatwick Airport to Washington, D.C. Dulles Intl Airport are updated daily.

  • How old do you have to be to fly from London Gatwick Airport to Washington, D.C. Dulles Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Gatwick Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents required for your trip to Washington, D.C. Dulles Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C. Dulles Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Winchester
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Harpers Ferry
Towson
Rockville
Reston
Manassas
Gaithersburg
Fairfax
Glen Burnie

Why use momondo?

Why should I use momondo to find a flight deal from London to Washington, D.C.?

It is quick and easy to find London to Washington, D.C. flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Washington, D.C. that suits you.

Can I find flights from London to Washington, D.C. with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for London to Washington, D.C. flights to just show those with flexible booking policies.

How can momondo help me find flights from London to Washington, D.C.?

momondo helps you find the best flight between London and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from London to Washington, D.C. right now. Can momondo alert me if prices change?

Price alerts on flights to Washington, D.C. from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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